Improvement in fruit-jars



- i etui-tiedl tapes @niettemin A WILLIAM-SINOLAIR THOMPSON, OF ROCHESTER, NEW YORK.

Letters Patent No. 101,944, dated Apo-il 12, 1870.

IMPROVEMENT IN FRUIT-JARS.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern Be it known that I, WILLIAM SrxoLArn TnoMr soN, of the city of Rochester, county of Monroe andV State of New York, have invented a certain new and useful Improvement in I `ruitJars, of which the following is a specification.

Nature of I nfl-cation.

Ihis invention consists of alclamp and spring of peculiar construction for holding down the cover, at the same time giving it a degree of elasticity, as hereinaf- `ter described.

cavity or groove, e.

Its claws ff `hold under the beads g g of the jar in the ordinary way, and iu its top are made, at suitable distances apart, two longitudinal slots h 7l., with inner end enlargements or cross-slots t a', as clearly shown.

D is the spring, which is preferably cut or formed from a piece of Hat steel baud, of a width sutiicient to lit easily in the cavity or groove e of the clamp. Its ends are cut with narrow shanks It It, corresponding in width with the slots h h., and its extremities with heads or lugs l I, corresponding with i t'.

This spring is compressed or bent up, so that the heads l will enter holes 'i on the under side of the clamp, and is then released, the natural expansion causing the ends to spread, so as to rest inthe slots h, 'as in iig. 2, thereby preventing detachment.

In this condition vthe clamp and spring are applied to the jar over the cover, thereby holding the latter down to the packing.

I am aware that a coiled spring has been combined with a cover and clamp, the whole forming one connected fixture, and the cover having a stem passing up-through the clamp, by which the spring is compressed by the action of the linger.

I expressly disclaim thc broad principle involved, and confine myself to my method o f application.

The advantages of my arrangement are that I get a better bearing upon the cover. The cover is disconnected from the clamp and spring, so that if desired, when the atmospheric ressnre has fixed the cover in place, the clamp and spring may be removed. v

My device is much simpler and -more easily made and applied, and the vconstruction and arrangement are totally different.

Finally, the s unkencavity or groove of the clamp allows the spring to sink in out of sight, so that a casual examination would only show the bearings of the clamp itself upon the cover, while at the same time said cavity serves as a guide to keep the spring in place and to thus produce a uniform pressure upon the cover.

Claim.

l. The combination of the clamp O and atspring D, united through the medium of the slots h. i and gearings k l, in thcinanner and for the purpose speci- 2. The clamp, provided with the guards b, forming a cavity, e, for the` purpose of supporting the spring and preventing a lateral movement of the same, substantially as set forth.

In witnesswhereof I have hereunto signed my name in the presence of two-subscribing witnesses. WILLIAM SINOLAIR THOMPSON. Witnesses:

It. F. Oscoop, Gno. W. MIATT. 

